import java.util.ArrayList;
import java.util.List;

class Student {
    private int score;

    public Student(int score) {
        this.score = score;
    }

    public int getScore() {
        return score;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        students.add(new Student(85));
        students.add(new Student(90));
        students.add(new Student(78));
        students.add(new Student(92));
        students.add(new Student(88));

        if (!students.isEmpty()) {
            int sum = 0;
            for (Student student : students) {
                sum += student.getScore();
            }
            double averageScore = (double) sum / students.size();
            System.out.println("课程平均成绩为: " + averageScore);
        } else {
            System.out.println("没有学生成绩数据");
        }
    }
}